@Article{Kabłak-Ziembicka2006,
journal="Advances in Interventional Cardiology/Postępy w Kardiologii Interwencyjnej",
issn="1734-9338",
volume="2",
number="4",
year="2006",
title="Original articleValue of Doppler ultrasonography in renal artery stenosis recognition",
abstract="The purpose of this study was to investigate the accuracy of renal angiography and Doppler ultrasonography (DU) flow parameters in detection of renal artery stenosis (RAS).    Methods:  420 (286 M) patients, aged 63.6\&#177;9.6 y. underwent renal DU with the assessment of: peak systolic (PSV), end-diastolic (EDV) velocity in the renal artery, renal aortic ratio (RAR) and resistance index (RI). Intrarenal parameters were also assessed: acceleration (Acc), acceleration time (AT), difference in intrarenal resistance indices (DIRI) and length difference between kidneys.   Results:  On quantitative angiography, in 265 patients RAS was <30% lumen stenosis, in 70 patients it was between 30 and 49%, in 79 patients it was ł50%, and in 6 patients renal artery occlusion was found. The grade of RAS correlated significantly with PSV (r=0.720, p<0.001), RAR (r=0.718, p<0.001), kidney length difference (r=0.391, p<0.001), DIRI (r=\&#8211;0.359, p<0.001), AT (r=0.447, p<0.001) and Acc (r=\&#8211;0.534, p<0.001). Extracranial flow parameters differed significantly between patients with RAS <30% and RAS 30-49%, and between patients with RAS 30-49% and RAS \&#8805;50%. Renal size, mean DIRI, and AT values were all decreased significantly (p<0.001) only for RAS ł50% compared with values in patients with RAS 30-49% and <30%. The best performing parameters for RAS \&#8805;50% were revealed to be PSV, RAR, AT and kidney length difference. Cutoff values for PSV of 2.06 m/sec, for RAR of 2.71 and for AT of 93 msec provided the best predictive value with a sensitivity of 91.1%, a specificity of 94.3%, and positive and negative predictive values of 79.1% and 97.8%.    Conclusions:  DU with analysis of extra- and intrarenal flow is recommended as a useful method for noninvasive diagnosis and grading of RAS.",
author="Kabłak-Ziembicka, Anna
and Przewłocki, Tadeusz
and Tracz, Wiesława
and Kopeć, Grzegorz
and Kostkiewicz, Magdalena
and Pieniążek, Piotr
and Kozanecki, Artur
and Rzeźnik, Daniel
and Stompor, Tomasz
and Sułowicz, Władysław",
pages="266--273",
url="https://www.termedia.pl/Original-article-Value-of-Doppler-ultrasonography-in-renal-artery-stenosis-recognition,35,7105,1,1.html"
}